I just tried to compile Hypermail 2.1.0, but since 'make' failed and
I had found a mail in the mailinglist archive that said that this problem
was known and had been fixed, I tried the current source from the CVS tree.

I donÄ«t get the former error
parse.c: In function `loadoldheadersfrommessages':
[...]

but a new one instead:
string.o: In function `strcasestr':
/tmp/CVS/hypermail/src/string.c:217: undefined reference to `_tolower'
[...]